		Search-engine friendly clone of the ACL2 documentation.

Unicode-input-char

Unicode-input-char-p

Recognizer for unicode-input-char structures.

Signature
(unicode-input-char-p x) → *

Definitions and Theorems

Function: unicode-input-char-p

(defun unicode-input-char-p (x)
  (declare (xargs :guard t))
  (let ((__function__ 'unicode-input-char-p))
    (declare (ignorable __function__))
    (and (consp x)
         (eq (car x) :unicode-input-char)
         (true-listp (cdr x))
         (eql (len (cdr x)) 2)
         (b* ((unicode (std::da-nth 0 (cdr x)))
              (umarker (std::da-nth 1 (cdr x))))
           (and (unicodep unicode)
                (natp umarker))))))

Theorem: consp-when-unicode-input-char-p

(defthm consp-when-unicode-input-char-p
  (implies (unicode-input-char-p x)
           (consp x))
  :rule-classes :compound-recognizer)